Etesting

KVM

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Author: Zhao Shijie

Profile

KVM and QEMU profiles, please refer to:
qemu : https://zh.wikipedia.org/wiki/QEMU
kvm : https://en.wikipedia.org/wiki/Kernel-based_Virtual_Machine

Installation

Ubuntu

Option 1: ubuntu-package-install

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apt-get -y install qemu qemu-kvm libvirt-bin bridge-utils

Option 2: ubuntu-compile-install

  1. Install depended-upon package

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    apt-get install -y gcc zlib1g-dev libperl-dev libgtk2.0-dev libfdt-dev bridge-utils

  2. Compile

    First get the newest qemu code from estuary repository,then enter the QEMU code root directory and execute the following command step by step.

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    mkdir build
    cd build
    ../configure --target-list=aarch64-softmmu --enable-fdt --enable-kvm --disable-werror
    make -j5
    make install

Centos

Option 1: centos-package-install

CentOS official source of QEMU(aarch64) support is not good, you need to add linaro source

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[root@CentOS-D05 qemu]# cat /etc/yum.repos.d/Linaro-overlay.repo
[linaro-overlay]
name = Linaro Overlay packages for CentOS 7
baseurl = http://repo.linaro.org/rpm/linaro-overlay/centos-7/repo
enable = 1

During the installation if there is an error because of the network,please repeat.
Some of the linaro packages have not been verified by GPG,so close the gpg check.

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sed -i "/^gpgcheck/s/1/0/g" /etc/yum.conf
yum install qemu qemu-kvm libvirt libcanberra-gtk2 qemu-kvm qemu-kvm-tools libvirt-cim libvirt-client libvirt-java.noarch  libvirt-python libiscsi-1.7.0-5.el6  dbus-devel  virt-clone tunctl virt-manager libvirt libvirt-python python-virtinst bridge-utils -y

Option 2: centos-compile-install

  1. Install depended-upon package

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    yum groups mark convert
    yum groups mark install "Development Tool"
    yum group install "Development tools" -y
    yum install glib2-devel zlibrary zlib-devel pixman pixman-devel libfdt-devel libfdt -y

  2. compile

    First get the newest qemu code from estuary repository,then enter the QEMU code root directory and execute the following command step by step.

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    mkdir build
    cd build
    ../configure --target-list=aarch64-softmmu --enable-fdt --enable-kvm --disable-werror
    make -j5
    make install

Prepare image files

  1. Build estuary project with qemu option.
  2. Copy *.img and Image files generated from open-estuary/workspace/distro/ to current directory.

Enable virtual bridge

In order to enable virtual bridge, execute the following command:

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brctl addbr br0
ip addr add 192.168.2.1/24 dev br0
# add route
ip link set br0 up
ip route add 192.168.2.0/24 via 192.168.2.1 dev br0

Verification

There are two scripts that will be used when starting QEMU, put them into current directory.

  • qemu-ifup.sh:

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    [root@CentOS ~]# cat qemu-ifup.sh
    #!/bin/bash
    switch=br0
        if [ -n "$1"  ]; then
        #create a tap interface
        ip tuntap add $1 mode tap
        sleep 1
        #start up the tap interface
        ip link set $1 up
        sleep 1
        #add tap interface to the bridge
        brctl addif ${switch} $1
        exit 0
    else
        echo "error: no interface specified"
        exit 1
    fi

  • qemu-ifdown.sh:

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    [root@CentOS ~]# cat qemu-ifdown.sh
    #!/bin/bash
    switch=br0
    if [ -n "$1"  ]; then
        #delete the specified interface
        ip tuntap del mode tap $1
        #rlease tap interface from bridge
        brctl delif $(switch) $1
        #shutdown the tap interface
        ip link set $1 down
        exit 0
    else
        echo "error: no interface specified"
        exit 1
    fi
    [root@CentOS ~]#

  • Execute the following command to start qemu:

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    qemu-system-aarch64 -machine virt,gic_version=3 -cpu host -kernel Image -drive if=none,file=ubuntu.img,id=fs -device virtio-blk-device,drive=fs -append "console=ttyAMA0 root=/dev/vda1 rw rootwait" -device virtio-net-device,netdev=net0 -netdev tap,id=net0,script=qemu-ifup.sh,downscript=qemu-ifdown.sh -nographic -D -d -enable-kvm

  • Verify network capabilities, execute the following command in qemu:

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    ip addr add 192.168.2.3/24 dev eth0
    ping 192.168.2.1 -c 3

  • Verify the function of the virtual hard disk, follow these steps:

    1. create a dir in qemu

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      mkdir hello-world

    2. restart the qemu

      colse qemu: send CTRL+a,c to qemu, then input “quit“

    3. Confirm whether the newly created directory exists

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